Acetylene generator feed valve vibrator



March 16, 1937. M R DEMOTTE 2,073,785

ACETYLENE GENERATOR FEED VALVE VIBRATOR File-d Oct. 29, 1931 2Sheets-Sheet l \J Q g n L n m N .gjm tv). Q ai p INVENTOR:

arch l6f1937 M. P. DE MoTTE ACETYLENE GENERATOR FEED VALVE VIBRATORvFiled oct. 29, y1931 2 Sheets-Sheet 2 I'NVENTQR MAURICE F. DE MOTTEPatented Mar. 16, 1937 UNITED STATES ACETYLENE GENERATOR FEED VALVEVIBRATOR Maurice P. De Motte, Indianapolis, Ind., assgnor, by mesneassignments, to rUnion Carbidev and Carbon Corporation,

York l Application October 29,

9 Claims.

The invention is a Vibrator foragitating the feed valve in an acetylenegenerator of the carbide-to-water type.

`One object of the invention is to provide a vi- 5 brator that willoperate Whenever gas is drawn from the generator. Another object is toprovide a vibrator that will operate regardless of the amount of gasbeing drawn from the generator. Other objects are to provide a vibratorthat is simple in construction, low in cost, reliable in operation, andfree from trouble. Other aims, objects, and novel features will beapparent from the following specication and the accompanyingillustrations in which:

Fig. lis a fragmentary vertical section of an acetylene generatorshowing my improved vibrator attached to the carbide feed valve thereof.

Fig. 2 is a'vertical section of one form of my improved vibrator showingthe Vibrating element in rest position with one valve open.

Fig. 3 is a view similar to Fig. 2 showing the position of the vibratingelement during operation with the other valve open.

Fig. 4 is a vertical section of another form of my vibrator. n

Fig. 5 is a sectional 'View taken along 5-5 of Fig. 3, and

1 Fig. 6 is a sectional View taken along line 6-6 of Fig. 4.

In a medium pressure generator of the type described, the carbide feedvalve has two motions: a vertical motion` in response to the pressurewithin the generator to .start and stop the flow of carbide, and arocking motion, in response to the movement of gas being drawn from thegenerator, to produce a uniform rate of flow when the valve is open. Themeans for opening and closing the carbide feed valve comprises adiaphragm responsive to gas pressure within the generator and the meansfor rocking the valve comprises a vibrator in the gas outlet of thegenerator.

One example of my vibrator is shown in Figs. 2 and 3. This vibratorcomprises a casing I having an inlet II at one end thereof and an outletI2 at the bottom thereof. For convenience in manufacture the casing I0may be composed of two parts that are joined at VI3 by means ofinterfitting threads.

The interior of the casing I0 is provided with a horizontal cylindricalguideway I4; a beveled seat I5 in axial alinement with and slightlylarger than the guideway; and a cylinder IB in axial alinement with theguideway and the beveled seat and somewhat larger than either. A gaspassage extends through the guideway, the beva corporation of New 1931,serial No. 571,914f

eled seat,.and the cylinder, between the inlet II and theoutlet I2.

A vibrating mechanism within the casing I0 comprises a cylindrical guideI1 slidably mounted in the guideway I4 and provided with a segmentalpassage I8 therethrough smaller than either the inlet I I or the outletI2. Y Integral with the guide I1 is a poppet valve I9 adapted tocooperate with the beveled seat I5 to close the gas passage through thecasing I0. Guide I1 and poppet valve I9 are provided with an axialopening in which a shaft 20 is loosely fitted. Upon the inner end ofshaft 20 a piston 2I is rigidly mounted. This piston 2l is provided witha stem 22 that normally rests against the poppet valve IS for thepurpose of holding the valve and piston in a spaced relation. The outerend of shaft 20 is provided'with a nut or abutment 23 and between thisnut and guide I1 a valve spring 24 is held in partially compressedcondition. This spring 24 tends to normally hold poppet valve I9 incontact with the stem 22 o-f the piston 2 I.

An adjusting screw 25 is threaded in one wall of casing IIJ and theinner end of this screw is provided with an abutment 26. Between thisabutment 2E and the piston 2 I, a recoil spring 21 is held. Attached toshaft 2U is another shaft or rod 28 that connects the vibratingmechanism with another part of the generator, such as the carbide feedvalve or an arm carried thereby.

During the operation of this vibrator gas `at a pressure of about 15pounds per square inch enters inlet Il and passes through passage I8 andpoppet valve I9, which is normally open and relatively remote from itscooperating seat as shown in Fig. 2, and exerts a pressure against thepiston 2I that moves it in the direction of gas flow. During 'thismovement shaft 20 and valve spring 24 carry poppet valve I9substantially the length of chamber I9a until it closes. After itcloses, the inertia of piston 2| and the shaft 20, and the gas pressurein the chamber 29 between the valve I9 and the `piston -2I cause thepiston 2l to move out of the chamber 29 and beyond the end of thecylinder I6 as shown in Fig. 3. This allows the gas in the chamber 29 toescape. As soon as the pressure of the gas in chamber 29 has been re-Vlieved the recoil spring 21 and valve spring 24 move piston 2l in theopposite direction and close Vthe cylinder I6. VAfter the piston 2l hasclosed the cylinder stem 22 of the piston 2| strikes valve I9 and thenthe whole vibrating mechanism is moved by spring 21 and the impact `ofthe piston 2| until poppet valve I9 opens. This openingallows gas toagain `pass through the -poppet valve and bear against the piston andrepeat the cycle after the inertia of the vibrating mechanism has beenovercome. Therefore, as long as gas is being drawn from the generatorthrough casing i uof the vibrator, the vibrating mechanism therein willcontinue to reciprocate and transmit its movement to the carbide feedvalve of the generator.

Another example of my vibrator is shown in Fig. 4. This vibratorcomprises a casing 30 having a gas inlet 3l at one end thereof and a gasoutlet 32 at the under side thereof. The casing 39 may be formed in twoparts, for convenience in manufacture, and joined by intertting threads.The interior of casing 30 is provided with a cylindrical horizontalguideway 33; a beveled seat 34 in axial alinement with and somewhatlarger than the guideway; and acylinder 35 in axial alinement withguideway 33 and beveled seat 34 and somewhat larger than either. Avibrating mechanism within the casing 39 comprises a guide v36 inguideway 33 having a passage 37 therethrough of smaller area than theinlet 3l. A poppet valve 38 is integral with guide 36 and is adapted tocooperate with beveled seat 34. A piston 39 is likewise integral withguide 38 and is adapted to move in and out of cylinder 35. Valve 38 andpiston 39 are spaced thereby forming chamber 29 therebetween.

A gas passage is provided in the casing 30 through guideway 33, beveledseat 34, chamber 29, and cylinder 35. A recoil spring 40 between slidevalve 39 and an abutment 4l carried by screw 42 threaded in one wall ofcasing 30 is adapted to move the vibrating mechanism against thepressure of gas flow to close valve 38 and move piston 39 into cylinder35 thereby closing the gas passage through the vibrator.

During operation the valve 38 is normally closed, the piston 39 is inthe cylinder 35, and gas entering inlet 3| presses against the underside of poppet valve 38. When this pressure reaches a point where theforce of spring 40 is overcome, poppet valve 38 is opened, and thisopening allows the gas to press against the under side of piston 39. Asthe piston is larger than the poppet valve 38, the gas pressure exertsgreater force and tends to quickly move it to open position. This opensthe passage through casing 39 and allows gas to pass through thevibrator and reduce the pressure at the inlet. This pressure is reducedquickly and then spring 49 moves the vibrating mechanism against theflow of gas to closed position, from which the cycle of movement isrepeated. Therefore, during the time that gas is being drawn from thegenerator through the vibrator the vibrating mechanism continues toreciprocate and this movement is transmitted to the carbide feed valveof the generator.

The vibrators shown in Figs. 2, 3 and 4 may be provided with otherconventional features, such as packing 43, packing nut 44, and lock nut45.

The means of attaching my improved vibrator to an acetylene generator isillustrated in Fig. 1, which shows a generator casing 48 having acarbide hopper 41, and a carbide feed valve 48 at the outlet thereof,carried by or joined to a supporting lever 49 by means of a pivot 59.Lever 49 is adapted to be operated by diaphragm 5l in response tovariations in gas pressure within the generator to open and close valve48 in a manner well known in the art.

The inlet of my improved vibrator 52 is connected by suitable pipettings 53 to and forms part of the main gas delivery outlet 54 of casing46. A rod or shaft 28 attached to the vibrating element of my vibratorextends through ttings 53, outlet 54, and casing 46, and is joined bypivot 55 to arm 5G forming a part of valve 48. Therefore, when gas isbeing drawn from the generator, the movement of the vibrating mechanismis transmitted through rod 28 to arm 56, thereby causing valve 43 torock or vibrate on its pivot 59, and this movement causes carbide tofeed past the valve 48 at a more uniform rate.

My improved vibrator may be positioned otherwise than here indicated andit may be connected in a different manner with a carbide feed valve of adifferent type from that shown, and clearly it need not vibrate the feedvalve in the manner shown by way of illustration. Also equivalentelements may be substituted for those shown and they may be arranged ina different manner without departing from the spirit of the invention orthe scope of the claims.

I claim:-

1. A gas-operated vibrator comprising a casing having an inlet and anoutlet for gas, a cylinder formed in said casing, a piston in saidcylinder constructed and arranged to move out of said cylinder, and arecoil spring normally holding said piston in said cylinder, incombination with a poppet valve for closing the inlet to said cylinder,said poppet valve being movable with said piston, a guideway formed insaid casing, and a guide in said guideway connected to said poppetvalve.

2. A gas-operated vibrator comprising a casing having an inlet and anoutlet for gas, a cylinder formed in said casing, a piston in saidcylinder constructed and arranged to move out of said cylinder, and arecoil spring normally holding said piston in said cylinder, incombination with a poppet valve for closing the inlet to said cylinder,said poppet valve being movable with said piston, a guideway formed inthe inlet end of said casing, and a guide in said guideway connected tosaid poppet valve, said guide having a segmental gas passagetherethrough.

3. A gas-operated vibrator comprising a casing having an inlet and anoutlet for gas, a cylinder formed in said casing, a piston, and a recoilspring normally holding said piston in said cylinder, in combinationwith a poppet valve for closing the inlet to said cylinder, said poppetvalve being movable with said piston, a guideway adjacent and incontinuation of the gas inlet in said casing, and a guide in saidguideway connected to said poppet valve, said guide having a segmentalgas passage therethrough smaller than the gas inlet in said casing.

4. A gas-operated vibrator comprising a casing having an inlet and anoutlet for gas, a cylvinder formed in said casing, a piston, and arecoil spring normally holding said piston in said cylinder, incombination with a poppet valve for closing the inlet to said cylinder,said poppet valve being movable with said piston, a guideway formed insaid casing, a guide in said guideway connected to said poppet valve,and a vibrating rod supported by said guide and movable with saidpiston, said rod being connected with the mechanism to be vibrated.

5. A gas-operated vibrator comprising a casing having an inlet and anoutlet for gas, cylinder formed in said casing, a piston in saidcylinder constructed and arranged to move out of said cylinder, and arecoil spring normally holding said piston in said cylinder, incombination with a. poppet valve for closing the inlet to said cylinder,said lpoppet valve being movable With said piston and said piston beingmovable independently of said poppet valve, a guideway formed in saidoasing and a guide in said guideway connected to said poppet valve.

6. A gas-operated vibrator comprising a casing having an inlet and anoutlet for gas, a cylinder formed in said casing, a piston in saidcyling constructed and arranged to move out ci said cylinder, and arecoil spring normally holding said piston in said cylinder, incombination with a poppet valve for closing the inlet to said cylinder,said poppet valve being movable with said piston and said piston beingmovable independently of said poppet valve, a guideway formed in theinlet end of said casing, and a guide in said guideway connected to saidpoppet valve, said guide having a segmental gas passage therethrough.

7. A gas-operated vibrator comprising a casing having an inlet and anoutlet for gas, a cylinder formed in said casing, a piston, and a recoilspring normally holding said piston in said cylinder, in combinationwith a poppet valve for closing the inlet to said cylinder, said poppetvalve being movable with said piston and said piston being movableindependently of said poppet valve, a guideway adjacent and incontinuation of the gas inlet in said casing, and a guide in saidguideway unitary with said poppet valve,

said guide having a segmental gas passage therethrough smaller than thegas inlet in said casing.

8. A gas-operated vibrator comprising a casing having an inlet and anoutlet for gas, a cylinder formed in said casing, a piston, and a recoilspring normally holding said piston in said cylinder, in combinationwith a poppet valve for closing the inlet to said cylinder, said poppetvalve being movable with said piston and said piston being movableindependently of said poppet valve, a guideway formed in said casing, aguide in said guideway unitary with said poppet valve, and a vibratingrod supported by said guide and movable with said piston, said rod beingconnected with the mechanism to be vibrated.

9. A gas-operated vibrator comprising a casing having an inlet and anoutlet for gas, a cylinder formed in said casing, a piston, and a recoilspring normally holding said piston in said cylinder, in combination wtha poppet valve for closing the inlet to said cylinder, said poppet valvebeing movable with said piston and said piston being movableindependently of said poppet valve, a guideway formed in said casing, aguide in said guideway unitary with said poppet valve, and a vibratingrod supported by said guide extending loosely tted through said guideand said poppet valve and tightly connected to said piston, said rodbeing connected with the mechanism to be vibrated.

MAURICE P. DE MofrrE.

